It's so hot that the detectives just want to lie under the apple tree, but not investigate the murders. But they cannot refuse a guy from a small town who is looking for a missing girlfriend. Soon they manage to find out that the girl was killed in the park, where lovers usually make an appointment. According to her friend, the girl had a young man, whose name she carefully hid from everyone . Why? Maybe he was married, or maybe his wealthy parents would not approve of a marriage with a simple girl? Detectives will have to find out whether the young man was a murderer, or someone else needed to get rid of her...